\part{part}
part text
part text
\chapter{chapter long title}
chapter text
chapter text
\[
	f(x)=x^2
\]
\section[for the toc]{section}
section text
section text
\section[for the toc]{section}
section text
section text
\subsection[for the toc]{subsection}
subsection text
subsection text
\subsection[for the toc]{subsection}
subsection text
subsection text
\section[for the toc]{section}
section text
section text
\chapter{chapter}
chapter text
chapter text
\part{part}
part text
part text
\chapter[toc]{chapter title}
chapter text
chapter text
\section[for the toc]{section}
section text
section text
\subsubsection[for the toc]{subsubsection}
subsubsection text
subsubsection text
\paragraph{paragraph}
paragraph text
paragraph text
\subparagraph{subparagraph}
subparagraph text
subparagraph text
\section[for the toc]{section}
section text
section text
\subsubsection[for the toc]{subsubsection}
subsubsection text
subsubsection text
\paragraph{paragraph}
paragraph text
paragraph text
\subparagraph{subparagraph}
subparagraph text
subparagraph text
\chapter[somethingelse]{goes here}
